package com.netcracker.ui.command;

import com.netcracker.entity.Book;
import com.netcracker.util.service.BookService;
import com.netcracker.util.service.ServiceFacade;
import com.netcracker.util.service.exception.DataTransmittingException;
import com.netcracker.util.service.exception.NullDataException;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.LoggerFactory;

public class GetAllBooksCommand implements Command {
    private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(GetAllBooksCommand.class);
    private final ServiceFacade serviceFacade;

    public GetAllBooksCommand(ServiceFacade serviceFacade) {
        this.serviceFacade = serviceFacade;
    }

    @Override
    public String execute(HttpServletRequest request, HttpServletResponse response) {
        BookService bookService = serviceFacade.getBookService();
        try {
            List<Book> books = bookService.findAllBooks();
        } catch (DataTransmittingException ex) {
            request.setAttribute("error", "Ошибка обращения к БД.");
            LOGGER.error("DB error: ", ex);
        } catch (NullDataException ex) {
            request.setAttribute("error", "Книг не найдено.");
        }
        return "books.jsp";
    } 
}
